Paper feeding mechanism

A paper feeding mechanism, comprising:

• a mechanical frame;
• a gear assembly mounted to the mechanical frame, and the gear assembly including a drive gear, and a transmission gear engaged with the drive gear;
• a paper supply tray, a rear end of the paper supply tray being pivoted to the mechanical frame;
• a pickup assembly assembled to the mechanical frame and the paper supply tray, and a top of the pickup assembly projecting above a top surface of the paper supply tray;
• a paper pressing assembly driven by the gear assembly, and mounted to the mechanical frame and located above the paper supply tray, the paper pressing assembly including a paper pressing frame disposed above the paper supply tray, a paper pressing tray mounted inside of the paper pressing frame, a gear shaft mounted to the paper pressing frame and connected with the transmission gear, at least one swing arm mounted to the gear shaft, and an elastic element elastically restrained between the paper pressing frame and the paper pressing tray, one end of the swing arm being mounted to one end of the gear shaft, and the other end of the swing arm being driven by the gear shaft to rotate around the gear shaft and horizontally slide in the paper pressing tray;
• and
• a stopper assembly being assembled to the paper pressing tray and the paper pressing frame, the stopper assembly including a blocking element and a connecting element, the blocking element being disposed perpendicular to the paper supply tray and being assembled to the paper pressing frame, one end of the connecting element being pivotally mounted to the paper pressing tray and the other end of the connecting element being pivotally mounted to a top of the blocking element,
• wherein the drive gear of the gear assembly rotates to a rotational position to drive the transmission gear and the gear shaft to rotate to bring along the swing arm to swing and pull the paper pressing tray to raise up to flush with a bottom surface of the paper pressing frame, simultaneously, an elastic potential energy of the elastic element is overcome, in the process of the paper pressing tray raising, the connecting element drives the blocking element to move downward and a paper blocking function is achieved by the blocking element, when feeding, the drive gear of the gear assembly is set free from an external driving force, the elastic element pushes against the paper pressing tray to move downward, the blocking element is raised up such as to be separated from the paper supply tray, thereby cancelling the paper blocking function of the blocking element of the stopper assembly.